LiHosts.c revision 61b2299d 
1/* $Xorg: LiHosts.c,v 1.4 2001/02/09 02:03:34 xorgcvs Exp $ */
2/* $XdotOrg: lib/X11/src/LiHosts.c,v 1.4 2005-07-03 07:00:55 daniels Exp $ */
3/*
4
5Copyright 1986, 1998  The Open Group
6Copyright 2004 Sun Microsystems, Inc.
7
8All rights reserved.
9
10Permission is hereby granted, free of charge, to any person obtaining a
11copy of this software and associated documentation files (the
12"Software"), to deal in the Software without restriction, including
13without limitation the rights to use, copy, modify, merge, publish,
14distribute, and/or sell copies of the Software, and to permit persons
15to whom the Software is furnished to do so, provided that the above
16copyright notice(s) and this permission notice appear in all copies of
17the Software and that both the above copyright notice(s) and this
18permission notice appear in supporting documentation.
19
20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
23OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
24HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
25INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
26FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
27NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
28WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
29
30Except as contained in this notice, the name of a copyright holder
31shall not be used in advertising or otherwise to promote the sale, use
32or other dealings in this Software without prior written authorization
33of the copyright holder.
34
35X Window System is a trademark of The Open Group.
36
37*/
38
39/* This can really be considered an os dependent routine */
40
41#define NEED_REPLIES
42#ifdef HAVE_CONFIG_H
43#include <config.h>
44#endif
45#include "Xlibint.h"
46/*
47 * can be freed using XFree.
48 */
49
50XHostAddress *XListHosts (
51    register Display *dpy,
52    int *nhosts,	/* RETURN */
53    Bool *enabled)	/* RETURN */
54{
55    register XHostAddress *outbuf = NULL, *op;
56    xListHostsReply reply;
57    long nbytes;
58    unsigned char *buf, *bp;
59    register unsigned i;
60    register xListHostsReq *req;
61    XServerInterpretedAddress *sip;
62
63    *nhosts = 0;
64    LockDisplay(dpy);
65    GetReq (ListHosts, req);
66
67    if (!_XReply (dpy, (xReply *) &reply, 0, xFalse)) {
68       UnlockDisplay(dpy);
69       SyncHandle();
70       return (XHostAddress *) NULL;
71    }
72
73    if (reply.nHosts) {
74	nbytes = reply.length << 2;	/* compute number of bytes in reply */
75
76	op = outbuf = (XHostAddress *)
77	    Xmalloc((unsigned) (nbytes +
78	      (reply.nHosts * sizeof(XHostAddress)) +
79	      (reply.nHosts * sizeof(XServerInterpretedAddress))));
80
81	if (! outbuf) {
82	    _XEatData(dpy, (unsigned long) nbytes);
83	    UnlockDisplay(dpy);
84	    SyncHandle();
85	    return (XHostAddress *) NULL;
86	}
87	sip = (XServerInterpretedAddress *)
88	 (((unsigned char  *) outbuf) + (reply.nHosts * sizeof(XHostAddress)));
89	bp = buf = ((unsigned char  *) sip)
90	  + (reply.nHosts * sizeof(XServerInterpretedAddress));
91
92	_XRead (dpy, (char *) buf, nbytes);
93
94	for (i = 0; i < reply.nHosts; i++) {
95#ifdef WORD64
96	    xHostEntry xhe;
97	    memcpy((char *)&xhe, bp, SIZEOF(xHostEntry));
98	    op->family = xhe.family;
99	    op->length = xhe.length;
100#else
101	    op->family = ((xHostEntry *) bp)->family;
102	    op->length =((xHostEntry *) bp)->length;
103#endif
104	    if (op->family == FamilyServerInterpreted) {
105		char *tp = (char *) (bp + SIZEOF(xHostEntry));
106		char *vp = memchr(tp, 0, op->length);
107
108		if (vp != NULL) {
109		    sip->type = tp;
110		    sip->typelength = vp - tp;
111		    sip->value = vp + 1;
112		    sip->valuelength = op->length - (sip->typelength + 1);
113		} else {
114		    sip->type = sip->value = NULL;
115		    sip->typelength = sip->valuelength = 0;
116		}
117		op->address = (char *) sip;
118		sip++;
119	    } else {
120		op->address = (char *) (bp + SIZEOF(xHostEntry));
121	    }
122	    bp += SIZEOF(xHostEntry) + (((op->length + 3) >> 2) << 2);
123	    op++;
124	}
125    }
126
127    *enabled = reply.enabled;
128    *nhosts = reply.nHosts;
129    UnlockDisplay(dpy);
130    SyncHandle();
131    return (outbuf);
132}
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